904L is a high-alloy austenitic stainless steel with low carbon content. The evaluation is expected for utilization under serious destructive conditions. It has been application demonstrated over numerous years and was initially created to oppose erosion in weaken sulfuric corrosive. It is institutionalized and endorsed for weight vessel use in a few nations. Basically, 904L is completely austenitic and is less touchy to precipitation ferrite and sigma stages than customary austenitic evaluations with high molybdenum content. Typically, because of the blend of generally high substance of chromium, nickel, molybdenum and copper 904L has great imperviousness to general consumption, especially in sulfuric and phosphoric conditions.

Corrosion resistance:

904L is a high-combination austenitic stainless steel with low carbon content. The evaluation is expected for utilization under serious destructive conditions. It has been application demonstrated over numerous years and was initially created to oppose erosion Grade 904L has a high consumption imperviousness to an extensive variety of destructive situations. A PRE of 35 demonstrates that the steel evaluation has great imperviousness to warm ocean water and other high chloride situations. High nickel substance brings about a vastly improved imperviousness to stretch erosion breaking than the standard austenitic evaluations. Copper upgrades the consumption resistance in specific acids, especially in the extremely forceful "mid focus" range.

Heat Resistance

Great imperviousness to oxidation, however like other much alloyed evaluations experiences auxiliary flimsiness (precipitation of weak stages, for example, sigma) at hoisted temperatures. 904L ought not to be utilized above around 400° C.

904L can be effectively welded by all standard systems. Care needs to be taken as this evaluation cements completely austenitic, so is powerless to hot splitting, especially in obliged components. No preheat ought to be utilized and as a part of most cases post weld heat treatment is likewise not needed. AS 1554.6 prequalifies Grade 904L poles and cathodes for welding of 904L.

Fabrication

904L is a high immaculateness, low sulfur grade, and accordingly won't machine well. Regardless of this the evaluation can be machined utilizing standard strategies. Bowing to a little sweep is promptly done. By and large this is performed cool. Resulting strengthening is by and large not needed, despite the fact that it ought to be considered if the manufacture is to be utilized as a part of a situation where extreme anxiety erosion splitting conditions are expected.